Gemstones of the World

Cover
Sterling Publishing Company, Inc., 2006 - 311 Seiten
Gemstones of the World is truly the single volume that every hobbyist, jeweler, jewelry maker, and rockhound needs: it’s the cornerstone of the field. And this updated edition contains a host of new findings on “Gemstones for Collectors,” additional gems in the “Table of Constants,” and the “double fraction” figures that experts have long wanted—a very special new feature.
All the gemstones are treated in their many variations: more than 1,500 full-color photos showcase each precious and semiprecious stone in both its rough, natural, and its polished and cut renditions. Each entry offers complete information on the gemstone’s formation, structure, physical properties, and characteristics, along with the best methods of working, cutting, and polishing it. There are even full treatments of lesser-known gems, from andalusite to vesuvian, and a special section is devoted to rocks as precious stones, including alabaster, onyx, obsidian, and fossils. Organic gem materials are also covered, such as coral, ivory, amber, and pearl. Charts and tables help collectors identify unknown gemstones and check for genuineness.
 

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Great decsciption

Nutzerbericht  - beckam - Overstock.com

A great teaching book. It goes into details on how stone are formed and the mineral compositions. Vollständige Rezension lesen

Inhalt

Preface
7
Origin and Structure
14
Properties of Gemstones
20
Optical Properties
31
Inclusions
58
Mining Methods
64
Classifications of Gemstones
82
Description of Gemstones
85
Opal Species
166
Peridot
174
Feldspar Group
180
Turquoise
186
Malachite
192
Scheelite
212
Serpentine
218
Organic Gemstones
250

Corundum Species
98
Beryl Species
106
Chrysoberyl
114
Garnet Group
120
Quartz
132
New on the Market
264
Symbolic and Beneficial Gemstones
275
Bibliography
285
Index
304
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